Indane Gas — Charging extra money and misbehaving with customer

I have been a prestige member of indane gas agency for years .Being a proactive customer, though I have shifted from ground to first floor of my house on same land of which I am the owner, I thought of getting my address updated to first floor as indane provide door step delivery so I walked up to six mile, Guwahati indane gas agency for the same. To my shock I was asked to pay extra Rs. 20 additional on top of the charges I pay to indane gas agency which already includes delivery charges. Also, people at the agency don't even know how to the behave and talk to a women.If this is how a customer is being treated, I would like close my connection with indane immediately and approach for better agency.

Therfore I want to raise a complaint against INDANE GAS AGENCY, SIX MILE GUWAHATI ASSAM